sea-floor spreading-the process of continually adding new material to the ocean floor. (see diagram) deep-ocean trenches- a deep underwater canyon where the sea-floor goes back into the mantle. subduction- the process of when the ocean floor sinks back into the mantle. sonar- a device that bounces sound waves off underwater objects Mid-ocean ridge- the longest chain of underwater mountains
Table of Contents
1.4 Sea-Floor Spreading
Vocabulary
sea-floor spreading-the process of continually adding new material to the ocean floor. (see diagram)
deep-ocean trenches- a deep underwater canyon where the sea-floor goes back into the mantle.
subduction- the process of when the ocean floor sinks back into the mantle.
sonar- a device that bounces sound waves off underwater objects
Mid-ocean ridge- the longest chain of underwater mountains
Outline
Mapping the mid-ocean ridge
Subduction and Earth's ocean
subduction in the Pacific ocean